//给一个整型开放数组求和的函数 function MyFun(const arr: array of Integer): Integer; var i: Integer; begin Result := 0; for i in arr do Result := Result + i; end; {测试1:} procedure TForm1.Button1Click(Sender: TObject); var num: Integer; begin num := MyFun([1,2,3]); ShowMessage(IntToStr(num)); {6} end; {测试2:} procedure TForm1.Button2Click(Sender: TObject); var iArr: array of Integer; i,x: Integer; begin SetLength(iArr, 10); for i := Low(iArr) to High(iArr) do begin iArr[i] := i + 1; end; x := MyFun(iArr); ShowMessage(IntToStr(x)); {55} end;